Test method for evaluating gasoline detergent in use Part 6: Engine dynamometer test method for influence of intake valve and combustion chamber deposit tendencies of gasoline deter
1 Scope
This part specifies the standard stand test method and test equipment for the influence of intake value and combustion chamber deposits of gasoline detergent. This test method covers an engine dynamometer test procedure for evaluation of deposit tendencies on the intake valve of unleaded spark-ignition engine gasoline.
This part is applicable to the evaluation of detergency of both gasoline detergent and unleaded motor gasoline.
Note: This part does not explain all safety precautions. It is the responsibility of the method users to take corresponding safety and hygiene measures and to determine whether they comply with relevant laws and regulations before use.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document applies.
GB/T 19000-2000 Quality management systems—Fundamentals and vocabulary
JJF 1001-1998 General terms in metrology and their definitions
ASTM D 3306 Standard specification for glycol base engine coolant for automobile and light-duty service
ASTM D 5302 Test method for evaluation of automotive engine oils for inhibition of deposit formation and wear (Sequence-VE method)
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3 Summary of test method
The engine used in the test is M111 engine with four cylinders, four strokes, four valves per cylinder, electronically controlled ignition and gasoline injection system and displacement of 2.0L produced by DaimlerChrysler. Before the engine test, run-in (for new engines) shall be carried out according to the specified working conditions. Before each test, relevant parts shall be cleaned according to the specified procedures and systematically inspected. Then, the engine cycle test shall be carried out according to strict test working conditions, and 800 cycles shall be completed within 60h; the deposits in the intake valve and combustion chamber after the test shall be collected carefully with special tools, and the evaluation of the deposits shall be completed within 16h.
Foreword i
1 Scope
2 Normative references
3 Summary of test method
4 Equipment
5 Uncertainty of calibration and measurement
6 Calibration gasoline, reference engine oil, reference coolant and test gasoline
7 Test preparation
8 Test procedures
9 Test evaluation
10 Report
11 Precision of test methods
Annex A (Informative) Calibration gasoline
Annex B (Informative appendix) Reference engine oil
Annex C (Normative) Base gasoline
Annex D (Normative) Deposit collection tools and its preparation
Annex E (Informative) Test database
Bibliography
